How do i attach a file to the email???

I have been asked by freepay to send them something that can only be attached in a regular email. how do I attach a file to the emails that I send freepay?

What type of file are you trying to attach? You could upload it to some webspace and send freepay the link to the file that way. You could also PM Jake, the freepay representative, and ask him what to do.